ASM managing multiple databases

Our db is 10.2.0.3 and server is MS 2003. Storage for databases is EMC.
We have one ASM instance which is used for managing multiple databases. When I logon to one database and query v$asm_diskgroup I can see all diskgroups in the ASM which means that I can see diskgroups which belong to other databases. Is this correct? We have experienced some temp data files corruptions so I am wondering if these two are related.
Thanks for your inputs and have a great weekend!
Shirley

We have one ASM instance which is used for managing
multiple databases. When I logon to one database and
query v$asm_diskgroup I can see all diskgroups in the
ASM which means that I can see diskgroups which
belong to other databases. Diskgroups do not belong to any database, files within diskgroups belong to databases, but diskgroups belong to ASM, which is a separate instance, and can exist without any database.
We have experienced some temp data files corruptions
so I am wondering if these two are related.I don't think so...

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